
import java.io.*;
import java.util.*;

/**
 * 
 */
public class Library {

    /**
     * Default constructor
     */
    public Library() {
    }

    /**
     * 
     */
    private List<book> books;

    /**
     * 
     */
    private List<User> Users;

    /**
     * 
     */
    private List<Loan> loans;

    /**
     * @param book
     */
    public void addBook(Book book) {
        // TODO implement here
    }

    /**
     * @param book
     */
    public void removeBook(Book book) {
        // TODO implement here
    }

    /**
     * @param user
     */
    public void addUser(User user) {
        // TODO implement here
    }

    /**
     * @param user
     */
    public void removeUser(User user) {
        // TODO implement here
    }

    /**
     * @param bookname
     */
    public void findBook(String bookname) {
        // TODO implement here
    }

    /**
     * @param userId
     */
    public void findUser(String userId) {
        // TODO implement here
    }

}